desperate need of sleep aid advice..?!

Hi, am a 23 years old student of higher education and I have been getting very little sleep for the past two weeks and some days I just cant sleep to a recent emotional trauma.
My doctor recently prescribed 1mg ativan to be cut in half and taken twice daily. The first night of taking this I slept although I woke up abt 4 hours after and found it a bit difficult to go back to sleep.

Then next day however, I took it again but didnt sleep in the night at all. Does this mean I should get him to increase the dose? This has really been disrupting recent my recent studies.

I had previously taken diazepam which enabled me to be able to sleep at nights but he doesnt want me to have long term side effects from it.

Any advice here? Thanks in advance.